Towing hitch for connecting a trailer to a wheeled vehicle

Abstract

A towing hitch includes a fixing bar, a fixing ball, and a stepped seat. The towing hitch is used for connecting a trailer to a wheeled vehicle, such as a car or the like. Thus, the fixing bar is formed with a mounting shaft for detachably mounting the fixing ball or the fixing bar, so that the towing hitch has a detachable structure, thereby facilitating assembly of the towing hitch, and thereby decreasing costs of fabrication.

1 . A towing hitch, comprising a fixing bar, and a fixing ball, wherein: 
 the fixing bar has a first end formed with a threaded face for screwing a nut and a washer, a mediate portion integrally formed with a stepped seat, and a second end formed with a threaded rod and a mounting shaft; and    the fixing ball is detachably mounted on the fixing bar and has a first end formed with a mounting hole mounted on the mounting shaft of the fixing bar and a second end formed with a screw bore screwed on the threaded rod of the fixing bar.    
   
   
       2 . The towing hitch in accordance with  claim 1 , wherein the mounting shaft is located between the stepped seat and the threaded rod.  
   
   
       3 . The towing hitch in accordance with  claim 1 , wherein the mounting shaft has a diameter greater than that of the threaded rod.  
   
   
       4 . The towing hitch in accordance with  claim 1 , wherein the second end of the fixing ball has an open side and the screw bore of the fixing ball is extended through a whole length of the second end of the fixing ball.  
   
   
       5 . The towing hitch in accordance with  claim 1 , wherein the first end of the fixing ball has a periphery formed with an annular abutment rested on the stepped seat of the fixing bar.  
   
   
       6 . The towing hitch in accordance with  claim 1 , wherein the second end of the fixing ball has a closed side and the screw bore of the fixing ball is not extended through the whole length of the second end of the fixing ball.  
   
   
       7 . The towing hitch in accordance with  claim 1 , wherein the washer is a substantially C-shaped elastic washer.  
   
   
       8 . The towing hitch in accordance with  claim 1 , further comprising an O-ring mounted on the fixing bar and clamped between the stepped seat of the fixing bar and the abutment of the fixing ball to provide a buffer effect.  
   
   
       9 . A towing hitch, comprising a fixing bar, a fixing ball, and a stepped seat, wherein: 
 the fixing bar has a first end formed with a threaded face for screwing a nut and a washer and a second end formed with a mounting shaft;    the fixing ball is integrally formed on the second end of the fixing bar and has an end having a periphery formed with an abutment; and    the stepped seat is detachably mounted on the second end of the fixing bar and has an inside formed with a mounting hole mounted on the mounting shaft of the fixing bar.    
   
   
       10 . The towing hitch in accordance with  claim 9 , wherein the mounting shaft has a diameter greater than that of the threaded face.  
   
   
       11 . The towing hitch in accordance with  claim 9 , wherein the fixing ball has an end having a periphery formed with an abutment, and the stepped seat has an end having a periphery formed with a lip rested on the abutment of the fixing ball.  
   
   
       12 . The towing hitch in accordance with  claim 11 , wherein the abutment is located adjacent to an end of the mounting shaft of the fixing bar.  
   
   
       13 . The towing hitch in accordance with  claim 9 , wherein the mounting shaft of the fixing bar is located between the threaded face of the fixing bar and the fixing ball.  
   
   
       14 . The towing hitch in accordance with  claim 9 , wherein the fixing ball has an end having a periphery formed with a positioning groove located adjacent to an end of the mounting shaft of the fixing bar, and the stepped seat has an end having a periphery formed with a lip inserted into the positioning groove of the fixing ball.  
   
   
       15 . The towing hitch in accordance with  claim 14 , wherein the positioning groove of the fixing ball has a periphery formed with a locking hole, and the lip of the stepped seat has a periphery formed with a locking stub locked in the locking hole of the fixing ball.